JRSC E85 Delicious Issue

[loiselle1987]

i'm filling up with e tonight and will see what happens. if it goes away i'll just run e.

i've heard it's bad for the car to not run 93 like once every 3 or 4 tanks, does anyone know if there's any truth to that?

[Sapphireho]

Mine will stall when coming to a stop about the first 4 or 5 stops when I go from e85 to 91. I haven't talked to Delicious about it. I figured it is learning the new fuel. It goes away after that first 4 or 5 stops, then is fine. Does not happen when I go from 91 to e85.

I have a very similar setup as OP with C30 tuned by Bill of Delicious.


Please keep us posted.

[CSG Mike]

Originally Posted by loiselle1987

i'm filling up with e tonight and will see what happens. if it goes away i'll just run e.

i've heard it's bad for the car to not run 93 like once every 3 or 4 tanks, does anyone know if there's any truth to that?

E85 doesn't have detergents, so yes, you want to run pump gas every few tanks, or run Techron additive to keep your fueling system and valves clean.

I also recommend running OEM pulleys. Lighter =/= better. Damped pulleys are typically heavier than OEM, but race engine, particularly drag engines, use them. Just some food for thought.

[loiselle1987]

Originally Posted by CSG Mike

E85 doesn't have detergents, so yes, you want to run pump gas every few tanks, or run Techron additive to keep your fueling system and valves clean.

I also recommend running OEM pulleys. Lighter =/= better. Damped pulleys are typically heavier than OEM, but race engine, particularly drag engines, use them. Just some food for thought.

so you're saying the lightweight pulleys are not helping but hurting??

if it's causing the issues then understood, but i do like the better throttle response

and running e today was significantly better than pump, no stalling

[VABeachBRZ]

Originally Posted by southside iraq

@VABeachBRZ I had the same problem when I ran a mix of 91 and e85 around e20 with the Ac on my car would stall when changing gears

Yeah any mix, it goes crazy. But now I’m running straight 93 and it’s good as new. Same with 85....

[CSG Mike]

Originally Posted by loiselle1987

so you're saying the lightweight pulleys are not helping but hurting??

if it's causing the issues then understood, but i do like the better throttle response

and running e today was significantly better than pump, no stalling

Correct.

I don't think throttle response is an issue with your setup.

[Dru670]

Is this figured out?

[loiselle1987]

Yes, i stopped using Delicious Tuning and will never remote tune this car again.

A local guy in Atlanta was able to get it in one pass.

The port/direct injection transition was part of the issue - running great now, but now it's not flex - the Delicious Tuning flex fuel kit I bought doesn't work anymore.

Now it's 2 maps running E more than 93 and it runs like a beast - and the LW pulleys were never the problem

[Decimus]

Originally Posted by loiselle1987

Yes, i stopped using Delicious Tuning and will never remote tune this car again.

A local guy in Atlanta was able to get it in one pass.

The port/direct injection transition was part of the issue - running great now, but now it's not flex - the Delicious Tuning flex fuel kit I bought doesn't work anymore.

Now it's 2 maps running E more than 93 and it runs like a beast - and the LW pulleys were never the problem

So this whole time your flexfuel kit failed and delicious never caught it via remote logs? I'm having intermittent fuel pressure drops around 2krpm while decelerating and im starting to believe its the flexfuel kit giving out

[CSG Mike]

Originally Posted by Decimus

So this whole time your flexfuel kit failed and delicious never caught it via remote logs? I'm having intermittent fuel pressure drops around 2krpm while decelerating and im starting to believe its the flexfuel kit giving out

If it's fuel *pressure*, wouldn't you think it's one of the fuel pumps, which generates the pressure?

[Decimus]

Originally Posted by CSG Mike

If it's fuel *pressure*, wouldn't you think it's one of the fuel pumps, which generates the pressure?

Could be the fuel pump, kinked fuel sock, fuel pressure regulator, flex fuel kit or something else. All i see right now are CEL lighting up on the dash and a ethanol content drop at around 2k rpm while decelerating. Doesnt effect track driving since im in the higher rpm but during stop and go traffic it can get annoying. Which fuel pump do you think it is?

[Grady]

Originally Posted by CSG Mike

If it's fuel *pressure*, wouldn't you think it's one of the fuel pumps, which generates the pressure?

Had a similar issue with mine. Fuel pressure and E content not stable. Causing check engine light and other strange things. Turned out it was water ingress into the box. Just assumed since it was designed to be installed in an engine compartment it would have an water IP rating of 4 or so. Come to find out its rating is 0. Be carful where you mount it. They are starting to use a hydrophobic coating on board now to help. Changed my mounting position to the front of the fuse box with the wire harness pointing straight down.

[CSG Mike]

Originally Posted by Decimus

Could be the fuel pump, kinked fuel sock, fuel pressure regulator, flex fuel kit or something else. All i see right now are CEL lighting up on the dash and a ethanol content drop at around 2k rpm while decelerating. Doesnt effect track driving since im in the higher rpm but during stop and go traffic it can get annoying. Which fuel pump do you think it is?

That depends.

Are you logging the DI or PI fuel pressure?

[Decimus]

Originally Posted by Grady

Had a similar issue with mine. Fuel pressure and E content not stable. Causing check engine light and other strange things. Turned out it was water ingress into the box. Just assumed since it was designed to be installed in an engine compartment it would have an water IP rating of 4 or so. Come to find out its rating is 0. Be carful where you mount it. They are starting to use a hydrophobic coating on board now to help. Changed my mounting position to the front of the fuse box with the wire harness pointing straight down. I just hope the box isnt already damaged beyond repair

I remember your suggestion, i have since switched to a nonvented hood and moved the dbox. I’ll relocate once more further away from anywhere that might see moisture to see if it helps. Thanks again.

Originally Posted by CSG Mike

That depends.

Are you logging the DI or PI fuel pressure?

I will log again and see if this is the issue. I have the MK1+ upgrade and i see a drop in ethanol content in the app everytime im at 2k. Besides this, Delicious has been super helpful in pinpointing any issues ive had.